Fig. 1. 1H NMR Spectrum of allyl glycidyl ether (neat) at 80 MHz
Compound: Allyl glycidyl ether (a reactive monomer with many applications such as a sealant for semiconductors and circuit boards as well as a starting material for many silicone compounds)
Fig. 2. Structure of allyl glycidyl ether
These multiplets can be analysed easily, as shown below for the olefinic protons H6, H7a and H7b. Of special interest here is the difference between cis (10.0 Hz) for the coupling between H6 and H7a and trans (17.30 Hz) between H6 and H7b, clearly visible as the smaller (multiplet D) and larger (multiplet C) doublet splittings, which are of course replicated in multiplet A. The 2-bond coupling between H7a and H7b as well as all couplings between the olefinic protons and H5 are much smaller, between 1.4 and 5.7 Hz.
Fig. 3. 1H NMR Spectrum of allyl glycidyl ether, showing the multiplets for H6, H7a and H7b
Even without full multiplet analysis assignments are straightforward because all signals are so well resolved:
Fig. 4. 1H NMR Spectrum of allyl glycidyl ether showing the assignments